The Learn'd Scholar is a secret achievement/trophy in the Deus Ex: Human Revolution DLC, The Missing Link. To acquire this achievement, you need to collect all three data storage devices. Make sure you find the first two (blue and red) before you take the "eye-activated" elevator down to the ocean floor. When you get to Dr. Kavanagh's lab, and find the third, you must then go about placing each device on their respective holographic tables.
The achievement name, The Learn'd Scholar, and its accompanying text description, are a reference to Walt Whitman's poem When I Heard the Learn'd Astronomer from his 1855 collection Leaves of Grass.